(a) In every amendment the applicant must indicate the exact word or words to be stricken from or inserted in the application. The applicant must indicate precisely where the insertion or deletion is to occur. Additions or insertions on the application must be made by the applicant, applicant's agent, or attorney.(b) An examiner may require the applicant to rewrite the entire application if the number or nature of amendments makes it difficult to consider the application. The examiner also may require the entire application to be rewritten to clarify the record.